Pint wire actuator

Details Pint wire actuator Pint wire actuator

1982-11-12

1984-08-28

Sewell, Paul T.

Typewriting machines

Typing by other than type-face or type-die

Character formation by impact

101 9305, 335261, B41J 312

Patent

active

044681429

ABSTRACT:
A solenoid-type print wire actuator includes a unitary one-piece bobbin formed of a magnetically permeable material and having two axially spaced-apart annular grooves in the outer surface thereof. An electromagnetic coil is wound on the bobbin. A dumbbell-shaped armature is disposed coaxially within the bobbin and is connected to the print wire for axial movement thereof, the armature having two cylindrical piston portions respectively disposed adjacent to the bobbin grooves. The ends of the bobbin are respectively supported in bores in the leg portions of a U-shaped member, the leg portions being interconnected by another piece to form a frame of magnetically permeable material to define a flux path.

REFERENCES:
patent: 3219853 (1965-11-01), Schreiber
patent: 3755700 (1973-08-01), Buschmann et al.
patent: 3897865 (1975-08-01), Darwin et al.
patent: 3946851 (1976-03-01), Cestrieres et al.
patent: 3994382 (1976-11-01), McIntosh
patent: 4200401 (1980-04-01), Roy et al.
patent: 4211496 (1980-07-01), Naylor
patent: 4218148 (1980-08-01), Matschke
patent: 4226545 (1980-10-01), Brandenburg et al.
patent: 4339109 (1982-07-01), Kawata et al.

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